HDRI wont work

Why Blender wont recognise .hdr file format?
when I load .hdr in Blender output window says unknown file format
I read BioRust tut but it wont help

please, I beg you HELP me

Blender’s internal render doesn’t support HDRI files, you need Yafray for that.
Get Yafray from www.yafray.org and install it.

Change render engine from Blender internal to Yafray, this will enable the HDRI support.

Note, that yafray and Belender light settings differ greatly, so you need to do some tweaking.

I have YafRay installed and working but it still wont recognise .hdr format